Sawing machine



July 12 1927' 1 B. sKoGLuND SAWING MACHINE Filed June 9, 1.926' 6Sheets-Sheet 1 I N VEN TOR.

' A TTORNE Y.

July 12 1927.

. B. sKoGLuND sAwING MACHINE `.ilad June 9, 19265 v 6y Sheets-Sheet .2

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A TTORNEY.

July '12 1927' B. sKoGLUND SAWING MACHINE Filed June 9, 1926 6shuts-Sheet 4 L INVENTOR.

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l.. B. sKoGLuND SAWING MACHINE Filed June 9, 192e -6 Sheets-Sheet 5 July12,1927.

l.. B. sKoGLuND SAWING MACHINE Filed June 9, 1926 6 Sheets-Sheet 6Patented July l2, 1927.

UNITED STATES PATENT OFFICE.

LEONARD IB. SKOGL'UND, OF FREMONT, NEBRASKA'.

sAwING MACHINE.

application med :une 9,1926. serial No. 114,097.

` machine comprising a frame and a circular p at opposite ends thereofand which feedl saw carried b said frame beneath the table and which tale may be adjusted upwardly or downwardly in relation to the saw in ahorizontal plane whereby kerfs or channels may be formed in the underside of a board of uniform depth. Also to provide means whereby thetable may be laterally moved in relation to the saw.

A further object is to provide means whereby the saw may be tilted tovarious inclinations thereby allowing a bevel of a predetermined degreeto be formed on a piece of material carried by the table or a mitre.joint to be'accurately formed. Also to provide means whereby thecircular saw during the operation thereof will traverse the tablelongitudinally thereby feeding the saw to a piece of material and awayfrom the piece of material after the sawing operation.

A further object is to mount the circular saw and its driving mechanismon a rockable frame carried by arcuate plates at the end of the deviceand slidably mounted in guides and gear means cooperating with saidplates whereby the same may be accurately moved for tilting the sawblade. Also to providea driven feed screw having clutch mechanisms screwis threaded throu' h the'mandrel block and the clutch mechamsrnscontrolled By a reversing mechanism and by means of which clutch andreverse mechanism the direction of traverse of the vsaw is automaticallychanged. Also to provide manual means for controlling the reversingmechanism or for holding the reversing mechanism in inoperative positionfor preventing the longitudinal movement of the saw when desired.

With the above and other objects in view the invention resides in thecombination and arrangement of. parts as hereinafter set forth, shown inthe drawings, described and claimed, it being understood that changes inthe precise embodiment of the invention may be made within the scope ofwhat is clalmed without departing from the spirit of the invention. f

In the drawings Figure 1 is a top plan view of the sawing machine.

Figure 2 is a side elevation of the sawing machine showing thetableraised.

Figure 3 is an end elevation of the sawing machine. 1

Figure 4 is a top plan view of the sawing machine showing the tableremoved to better show the structure.

Figure 5 is an enlarged top plan view of the reversing mechanism. Figure6 is a side' elevation of the reversmg mechanism.

Figure 7 is a transverse sectional view taken on line 7-7 of Figure 5,butshowing the mechanism tilted. for positioning the saw at an angle.

Figure 8 is a transverse sectional view taken on line 8-8 of Figure 5showing the saw mechanism at an angle.

Figure 9 is an enlarged bottom plan view of the clutch control lever andone of the clutches.

Referring to the drawing, the numeral 1 designates the end frames of themachine, which frames are connected together by bars 2. Slidably mountedin bearings of the end frames 1 are vertically disposed racks 3, withwhich racks gears 4 mesh, and which ears 4 are rotated by worm gears 5carried y the longitudinally disposed shaft 6, and which mesh with wormgears 5'* carried by the transversely disposed shafts 5b. One end of theshaft 6 is provided with a gear 7, with which a worm gear 8 carried by atransversely dis osed shaft 9 meshes. The ends of the sha t 9 areprovided with cranks 10, which are adapted to be grasped by the operatorfor rotating the shaft 9 and imparting rotation to the shaft 6 throughthe gears 8 and 7, when it is desired to raise or lower the saw table byraising or lowering the racks 3, which are preferably four in number.Mounted on the upper ends of the bars 3 is a saw table 12, and it willbe seen said saw table may be easily and quickly moved upwardly ordownwardly in relation to the circular saw 13 by rotating the cranks 10.The upper side of the saw table is provided With scales 14 which extendtransverselyL of the table and which may be used in connection with anadjustable guide member 15 for various purposes, for instance whencutting a strip of uniform width. One side of the table is provided withan angularly adjustable guide membeA 17, which may be adjusted atvarious angl s in relation'to the saw 13 for making angular cuts. Thesaw 13 is carried by a mandrel 18 which is provided with a worm 19, andthe worm 19 meshes with a wormgear 20 which is slidably keyed on thedrive shaft 22, one end of which is provided with a `drive pulley7 23,therefore it will be seen that when the drive pulley 23 is rotated, thesaw 13 will rotate therewith for a sawing operation, and when the tableis in lowered position, the saw will extend upwardly through the .sawslot 24 into engagement with a piece of material which may be on thetable. Saw 13 andthe mechanism for driving the same is carried by arockable cradle 25, the ends of which are provided with arcuate members26 which are slidably mounted in the guide lates 27 carried by the endframes 1 of the machine and the arcuate. plates 26 are provided withgear teeth 28, with which gears 29 imesh,l The gears 29 are carried by alon 'tudinally disposed shaft 30 which is rotata ly mounted in' bearingsof the plates` 27, and has its end provided with a crank 3l adapted tobe grasped by the operator for rotating the gears 29 and moving thearcuate members 26 for disposing the saw 13 at various inclinations andangular positions in relation to the saw table A12, thereby allowingbevels to be formed at any desired angle which is particularly desirablein a sawing machine adapted for general use by carpenters, the angularpositions are particularly' shown in Figures 7 and 8.

The table 12 is laterally movable on the upper bars 32 of the rack bars3 and is guided in its movement laterally and transversely by guide bars33 carried by the under side of the table. The ends of the table areprovided with blocks 34 through which are threaded shafts 35. One of theends of the shafts 35 is rotatably mounted in the plates 36 and providedwith worm gears 37, with which worm gears 38 carried by thelongitudinally disposed operating shaft 39 mesh, andl it will be seenwhen a crank is placed on Athe rectangular end of the shaft 39, and saidshaft is rotated, both threaded shafts 35 will be simultaneouslyrotated, thereby moving the table 12.laterally for properly positioningthe slot 24 in the table in relation to the saw, for instance when thesaw is adjusted at an angle.

The mandrel 18 is carried by a casing 40, and which casing is slidablymounted on the guide rods 4l, which connect the end plates 42 of thetiltable frame, and the drive shaft is rotatably mounted in bearings 43of said les 42. 'lhe worm gear 20 is slidably ed or feathered on-thedrive shaft 22, and tis obvious that as the shaft 18 and 19 are vcarriedby the casing 40,

lill@ Waluf said saw 13 would be operated no matter where it ispositioned longitudinally in relation to the drive shaft 22, and themechanism hereinafter is designed to traverse the l therrotation of thesaw during the cutting operation, and to accomplish this result athreaded feed screw44 is provided. The ends of the feed screw arerotatably mounted in.

bearings 45 of the plates 42 and the screw is threaded through member 46of the carriage 40. It will be noted when the feed screw 44 is rotatedinone direction the saw casing 40 will move in one direction and whenreversed the casing 40 will move in the opposite direction, and toaccomplish this result clutch elements 47 are provided, which clutchelements are slidably keyed on the ends of the feed screw 44 as clearlyshown in Fi mounted on theends of t e feed screw 44 are clutch elements48, whichare provided with integral gears 49, which in turn mesh w1thidle gears 50 and 51. It will be noted there .are two idle gears 51, andwith. one of which the drive gear 52 meshes at one end of the driveshaft 22, and the drive gear 52 at the other end of the drive shaft 20meshes with the single idle-gear 50, thereforeit will be seen that whenoneof the clutch elements 47 is in coo` erative en agement with one ofthe rotatable clutch e ements 48 the feed the downwardly extending ure9. Rotatably screw 44 will be rotated in one direction,

bolts 58 carried by the bifurcated members 54 are outwardly extendingU-shaped members 59, the Aarms of which are pivotally connected at 60 tobrackets 61 carried by the plates 25, thereby forming a fixed point andto the arms 62 of an inwardly extending U- shaped member 63 and coiledsprings 64 are` connected to the ends ofthe lll-shaped members 59 and 63and pass between the arms thereof, therefore it will be seen that whenthe members 59 and 63 are moved in either direction beyond alinedpositions ,the coiled springs 64 will, through their contracting force,control'the remote ends ofthe members 59 and 63, the purpose of whichwill presently appear. The outer ends of the U- shaped members 63 arehingedly connected at 65 to a. connecting bar 66, Iand which connectingbar is provided with adjustable stops 67 in the lpath `of a downwardlyextending arm 68 carried. by the casing 40. ,As the feed screw 44 movesthe casing 40 longitudinally in the direction of the arrow a, Fi ure5,/the

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bar 66 in the same direction as well as the outer end of the U-shapedmember 68 which will move on its pivotal point 60 until the part 63 isbeyond an alined relation with the U-shaped member 59, and at which timethe coiled spring 64 will contact and cause the U-shaped members 59 and63 to assume reversed angular positions to that shown in .Figure 5, andat the same time the clutch member 47 is moved into clutched relation tothe clutch member 48 thereby reversing the direction of rotation of thefeed screw 44. As said last named'clutch member is moved into operativeposition, the parts atthe other end of the device' are moved intodeclutched position, which allows a reverse direction of f rotation ofthe 4feed screw for reversing the v direction of traverse -of the casing40 and outward pull is imparted on the downwardly extending handlemember 72 which is piv-v otally connected at 73 to the lever 71, .and tothe latching bar 74. The latching bar 74 extends over the plate 75 andis provided wit-h` a downwardly extending arm 76. which when moved intothe notch 77 of the plate 75 will hold the reversing mechanism in anintermediate position against the action of y the coiled spring 64. Itwill'be noted that the lever 71 is interengaged with, the plate 75 andis also pivotally connected at 78 to the bolt 58, therefore the leverhas control "of the yoke bar 53.

F rom-the above it will be seen that a sawlng machlne 1s provided which1s adapted for various uses', the same is pos1t1ve in its operation, thesaw may be tilted to various` angles and traversed as desired.- It willalso be seen that the reve`rsing`of the movement of the sawis automaticand the power is obtained from a single source. v

The invention having been set forth what is claimed as new anduseful-is:

1. The combination with a sawing 1na` chine comprising a frame, arockable auxiliary frame mounted in the first mentioned frame, a driveshaft rotatably mounted in the auxiliary frame, a saw mandrel', a gearcarried bythesaw mandrel, a gear slidably keyed on the drive shaft andmeshing witx the mandrel gear, a rotatable feed screw carried by theauxiliary frame, driving klconnections between the ends of the feedscrew and the drive shaft, clutch elements cooperating with said drivingconnections, and reverslng mechanism cooperating with said clutchelements whereby when the'mandrel reaches a predetermined position inits movement in either direction, the direction .of rotation of the feedscrew will be reversed. K

2. The combination with a sawing machine having a traversingcar-riage,^a mandrel carried by said carriage, a drive shaft extendingthrough said carria e,'a gear carried by the mandrel, a gear sli ablymounted and keyed on the drive shaft and meshing with the mandrel gear,a rotatable feed screw threaded through the carriage and forming meansfor moving thecarriage longitudinally in either direction, gearconnections between the ends ofthe feed screw and the driving shaft,clutches slidably keyed on the feed screw, said clutches cooperatingwith clutch elements carried by t e gear connections, a yoke connectingsaid clutcl;

elements', of a longitudinally movable bar,-

stops carried by said bar, a stop carried by the carriage in the ypathof the bar,stops and spring actuated pivotally connectin membersconnecting the bar and theyo e and forming means whereby when one'ofsaid clutch elements is declutched the other clutch element is clutched.

3. The combination with a carriagefeed screw of a sawing machine, saidcarriage having a drive shaft rotatably mounted therein, rearconnections between the drive b v said feed screw may be rotated ineither direction, clutch elements slidably keyed on -shaft and the endsof the feed screw Wherethe feed screw, clutch elements carried by thegear connections and adapted to receive either of the first mentionedclutch-elements,

of a longitudinally movable bar, spaced stops carried by said bar, anarm carried by the carriage and movable between the stops and in thepath of thestops, inwardly extending lin-ks carried by the ends of thebar, the inner ends of said links being pivotally mounted, secondinwardly extending links pivoted to the innerV ends of the first-ment-ioned links, a-yoke connecting the first mentioned clutchelements, springs connecting theA links together and forming meanswhereby when said links pass beyond alined posi tion their angularrelation will be reversed thereby clutching or' declutching the firstmentioned-clutch elements.'

; In testimony whereofl I hereunto aiiix my signature.

